| Name | Structure/ Category | Description |
|---|---|---|
| Falcate | [Leaflets, Leaves, Petals, Phyllaries, Sepals] {shape} | Long, arcing to one side and |
| Fan-shaped | [Leaflets, Leaves] {shape} | Shaped like a fan, as a Gingko leaf. |
| Fascicle | [Inflorescences] {type} | A tight cluster of stalked (pedicellate) flowers, the stalks originating very close to one another and diverging little if at all. |
| Fascicled | [Leaves] {insertion} ; [Needles] {presence of clusters or fascicles} | In a tight bundle, several leaves appearing to arise from a common point and diverging little if at all, as the needles of many pines (Pinus). |
| Fibrous | [Roots] {type} | With several to many relatively slender roots of about the same diameter. |
| Filament | The stalk of a stamen, which supports an anther at its tip. | |
| Filiform | [Leaflets, Leaves] {shape} | Long and very slender, basically round in cross section and of uniform diameter; thread-like. |
| Flagellum | (pl. flagella) a long tapering process that projects singly or in groups from a cell or microorganism, is possibly equivalent to a much enlarged cilium, and is the primary organ of motion of flagellated protozoans and many algae, bacteria, and zoospores <.b>4 a long slender shoot (as a stolon or runner) of a plant | |
| Flaky | [Bark of mature trunks] {surface appearance} | Bark with more or less regular, thin flakes, as in eastern hophornbeam (Ostrya vriginiana) and many pines (Pinus). |
| Fleshy | [Seed cone scales] {type} | Fairly firm and dense, juicy or at least moist, and easily cut. |
